Theodore kruse



(No Model.)

T. KRUSE.

HEATING PURNAGE.

No. 404,006. Patented May 28, 1889.

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UNITED STATES PATENT OFFICE.

THEODORE KRUSE, OF INDIANAPOLIS, INDIANA.

HEATING-FURNACE.

SPECIFICATION forming part of Letters Patent No. 404,006, dated May 28, 1889.

Application filed June 29, 1888. Serial No. 278,597. (No model.)

To all whom it may concern:

Be it known that I, THEODORE KEUsE, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented certain new and useful Improvements in Heating-Furnaces; and I do hereby declare the following to be .a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and gases, dust, and smoke.

Another object of the invention is to so construct and arrange the parts of the furnace that the maximum amount of radiation of heat is secured and the furnace rendered absolutely or practically gastight.

WVith these objects in view the invention consists in certain details of construction and in the combination and arrangement of the several parts of the furnace, substantially as hereinafter described, and set forth in the claim.

Figure 1 represents in perspective a warmair furnace constructed in accordance with my invention, portions being broken away to show the parts more clearly; Fig. 2, an enlarged vertical cross-section of the supplemental radiator and smoke-drum, the section being taken on line 2 2, Fig. 3; Fig. 3, a horizontal cross-section of the same on dotted line 3 3, Fig. 2. v

In the drawings, A represents the main or outside casing, which will preferably be constructed of steel and of any desired or suitable form, it having openings in front for the reception of the coal-conduit a and its door a and the ash-pan and its door a the construc tion of which will be hereinafter described.

The hot-air pipes a enter the casing A near,

the top, and are of the usual construction and arrangement. Located within the casing A sufficiently remote from its sides is a tubular heating and combustion chamber, B, which includes the fire-box Z), grate-bars b and ashpanbelowthe grate-bars. (Not shown.) This heating chamber will preferably be constructed of wrought-steel plates in the form of a large tube with a circular or dome-shaped top, 6 which form greatly assists in the deflection of heat, so that the maximum amount of combustion of fuel is secured before the smoke escapes through the smoke-pipes D, which enter the heating-chamber at the rear side near the upper end, as clearly shown in the drawings, Figs. 1 and 2.

The fire-box and ash-pan may be of the usual construction, the grate-bars being of the construction illustrated in a patent heretofore granted to me.

Located within the casing A, and between the said casing and heating dome or chamber B, but remote from each, is a supplemental smoke-drum and heat-radiator, O, which radiator is constructed of wrought-steel plates riveted together and of a crescent or semicircular shape in cross-section, as clearly shown in Fig. 3. This radiator is in communication with the combustion-chamber B by smokepipes D, which enter the radiator near the top at either end, as shown in Figs. 2 and 3.

The outside walls of the radiator are formed by two wrought metal plates, 0' c bent in the arc of a circle and riveted together at their ends with a considerable space between them, said radiator being closed at the top and bottom by plates 0 o as shown in Fig. 2. Dividing the space between the two outside plates, 0 0 into a series of smoke-compartments is a series (preferably two) of vertical plates or partitions, E E, which are secured at their edges to the side plates, c 0 and abut at their upper ends against the top plate, c These plates E E form a partition or dividing wall between that portion of the radiator,where the smoke first enters from the combustion-chamber and the central portion of the radiator, where the smoke is emitted through the main smokepipe F.

These partition-plates E E do notioo extend the full length of the radiator, but terminate at a point somewhat remote from the bottom plate, a, as clearly shown in Fig. 2.

Secured to the rear plate, 0 of the radiator C, centrally between the two partition-plates E E, and just below the upper plate, a of the radiator, is a smoke box or conduit, G, which box or conduit is' of a width about one-half.the diameter of the .space between the two plates 0 c of the radiator and of a depth approximately one-half the length of said radiator. This smoke box or conduit is closed at the sides and lower end and open at the top, the main smoke-pipe F communicating with said smoke-box near its lower end. The smoke after leaving the combustion-chamber passes through the smoke pipes D into either end of the crescent-shaped radiator O at the top, thence downward and under the lower end of the partition-plates E E into the central compartment, thence upward and into the upper open end of the smoke box Gr, thence downward and out through the main smoke-pipe F.

By forming the radiator in the shape of a crescent I secure a large heating and radiating surface without greatly increasing the width of the casing A, and by the arrangement of the partition-plates E E and smokebox G as described, whereby the air and smoke in a superheated state, coming directly from the combustion-chamber B, must travel downward and upward over the entire internal area of the radiator C, I am enabled to utilize approximately the entire amount of heating qualities in the air and smoke before it is allowed to escape through the main smoke pipe F, thus heating the walls of the radiator and greatly assisting in warming the fresh air contained in the casing A. Again, it will be seen that by the use of this supplemental smoke-drum or radiator the smoke is discharged through the smoke-pipe F in a moderately cool state free from sparks and other analogous substances, thus obviating the liability of fire from overheated flues and the dirt resulting from the use of smokepipes in direct communication with the firebox or combustion-chamber.

By this construction of furnace it will be readily seen that by obviating waste in heat I secure the maximum amount of warm air with the minimum amount of fuel, which, aside from costof fuel, is a great desideratum, as it lessens the labor necessary to keep the furnace in operation and greatly increases the life and lessens the wear of the furnace, as by'securing as nearly as possible a perfect combustion of fuel and utilizing the entire heat resulting from such combustion without letting it escape up the flue it is not necessary to keep the fire at a white heat and the plates of the combustion-chamber strained by expansion through heat to heat the air;

the lower end of the radiator or supplemental smoke-drum G, at one side, is a cleanout opening, h, having a cap, 7L fitted therein, which clean-out. opening is provided to permit the soot and dirt deposited in the radiator to be removed.

The grate-bars b 'will preferably have a series of square lugs cast thereon in the usual manner, and have an annular flange, 11 east thereon near their forward end, which front end is square and passes through a removable plate, 12 which plate rests between two horizontal plates, b the lower one of which forms the upper frame portion, a of the door a the entire frame a of the door being flanged at its rear side, as shownat b by means of which the same is secured to the casing A. The plate 5 is removably secured at its ends to the horizontal plates 17 by vertical pintles or bolts 19, extending through bolt-'holes formed in the ends of said horizontal plates If (which plates are cast apart with the frame of the door) and through ears formed "at the ends of the removable plate b Connecting the main casing Awith the firebox I) is acoalchute, a preferably somewhat circular in form, it being flanged at its ends, as at a, which flanges are secured to the easing of the fire-box B and to the outside casing by rivets, theframe a of the door a forming the outside continuation of said chute.

This frame a has an outwardly-projecting portion, cf, of about the same external and internal diameter as the chute a, and has an annular flange, a to overlap the casing A,

and is beaded, as at a, at the front of the outwardly' -projecting portion a? to form an ornamental finish. The door a is of usual construction and arrangement.

Inasmuch as the construction and arrangement of the grate-bars b coal-chu te a,casing a, and door, as set forth in the four last preceding paragraphs, may embody patentable invention, they will form the" subject-matter of separate applications, being shown and described in the present application simply to explain their relative position as a part of the furnace.

I do not desire to limit myself to the number of partition-plates E E for the radiator shown in the drawings. 7 Neither do I desire to limit myself to the use of the smoke-box G in connection therewith, as this, if desired, might be dispensed with and a series of par.- tition-plates similar to those shown be used, secured to the bottom plate, 0 and sides of the radiator and terminating at a distance remote from the top plate. The use of the smoke-box G is, however, preferable. The shape of the radiator may also be varied, if desired, as might also the shape of the combustion-chamber, without departing from my invention.

In a heating-furnace, the combination, with the circular combustion-chamber B, of the ITO crescent-shaped radiator 0, located at the' rear of and extending around but a portion of the circumference of said combustioncommunication with its interior, substantially IO chamber, as shown, and having the two transas described, and for the purpose set forth. Verse dividing-partitions E E, extending from In testimony whereof I afiix my signature in the top of the radiator only a portion of its presence of two witnesses.

length, as set forth, flues connecting the radiator and combustion chamber, and the rlHEODORE KRUSE' smoke-box G, located centrally between the \Vitnesses: partitions and open at its top and closed at JOSEPH A. MINTURN, the bottom and having an outlet-opening in T. F. MEANY. 

